Um... not according to industry standards. But I'll agree they not a factory stock type replacement. Thought I mentioned the build tho... These are stocked catalog/shelf part number pistons for BOTH 340 and 360LA based 4" stroke engines using LA type rods. Tomato/tomaahhto...lol.
360Z - no need for the added block expense for this engine. Simple main studs and good machining and it will live just fine. Plus I was pleasantly surprised at how thick the bores were. Only one hole had core shift and it wasn't too bad. This block's going +.040 but it could go .060 with a 4" arm and have plenty of meat left. of course, that would mean a true custom piston by industry standards and again, we're sticking to a budget.